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Determine where each relation is a function if it is a function then indicate if it is a linear function

Determine where each relation is a function if it is a function then indicate if it-example-1
User Timir
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This is NOT a function because we have x = -5 repeating. The value x = -5 corresponds to y = 10 (column 1) and y = 8 (column 3). The value x = 5 repeats as well.

We can only have a function when every input leads to exactly one output.

If you graphed these points, it would fail the vertical line test. It is possible to pass a single vertical line through more than one point.

So once again, we don't have a function.
User Jim Ashworth
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